Postfix and no-ip

[gloomer]

I've got a webserver (Hiawatha) serving multiple no-ip domains.

So now I need to get and receive mail for those domains.

Example. One of the domains are example1.serveftp.com

I see 5 spaces for MX records with a box selecting each mx records priority.

so would the email domain be test@serveftp.com?

or what?

I don't know where to start. With this email server process.

[gloomer]

I installed postfix on debian, and don't know where to go from here.

I have my hostname in the postfix config. It's debian01.vc.shawcable.net

I input it in the mx records in no-ip, and it says "Mail Server is invalid: Hostname could not be resolved"

I'm totally confused here.

[gloomer]

Never mind. I went to some site that told me my real hostname.

s0106001839d6ad0b.vc.shawcable.net

that's what it is. I entered it in and apparently no-ip likes it.

So I have to wait 5 minutes for it to "propogate"

Then what?

And is it possible to change this long hostname to something different?